Maestro n° 101 : Page 87 - Gr 84
L1C2 -4- L1C6 =4= L2C6 -4-8- L2C6 =8= L2C5 -8-5- L2C5 =5= L1C5 -5-1- L1C5 =1= L1C2 donc L1C2 ≠ 4